/* **********************************************************
 * Copyright (c) 2020 Google, Inc.  All rights reserved.
 * **********************************************************/

/*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * * Neither the name of Google, Inc. nor the names of its contributors may be
 *   used to endorse or promote products derived from this software without
 *   specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL GOOGLE, INC. OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */

#include "tools.h"

int
main()
{
    void *bad_mem = mmap(NULL, 0, PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
    if (bad_mem != MAP_FAILED) {
        print("zero-length mmap succeeded\n");
        return EXIT_FAILURE;
    }

    void *mem = mmap(NULL, 1, PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
    if (mem == MAP_FAILED) {
        print("non-zero-length mmap failed\n");
        return EXIT_FAILURE;
    }

    int mprotect_res = mprotect(mem, 0, PROT_NONE);
    if (mprotect_res == -1) {
        print("zero-length mprotect failed\n");
        return EXIT_FAILURE;
    }

#ifndef MACOS
    void *new_mem = mremap(mem, 0, 0, 0);
    if (new_mem != MAP_FAILED) {
        print("zero-length mremap succeeded\n");
        return EXIT_FAILURE;
    }
#endif

    int munmap_res = munmap(mem, 0);
    if (munmap_res != -1) {
        print("zero-length munmap succeeded\n");
        return EXIT_FAILURE;
    }

    print("done\n");
}
